ThinkFacility Sign in

AI models · Anthropic

Claude Sonnet 5: release date and what it's for

Released , according to Anthropic's announcement. The $2 and $10 was billed as introductory pricing until the end of August. Anthropic made it permanent instead, so the increase everyone budgeted for isn't coming.

Status
Live
Released
Lab
Anthropic
Input
$2per million tokens
Output
$10per million tokens
Context window
1Mtokens
Max output
128Ktokens

API model ID: claude-sonnet-5

Explained: Claude models explained: Opus 5.5, Fable 5.1, Mythos and why there's no Opus 5.1

What we've written about Claude Sonnet 5

September 14, 2026

The day after agreeing AI should slow down, Musk said Grok 4.8 finishes training this week

Grok 4.7 still isn't out, Grok 5 is his answer for AGI, and neither OpenAI nor Anthropic lists a size to set 2.5T against.

How Claude Sonnet 5 compares on price and context

Price per million tokens

inputoutput

  1. Claude Mythos 5.1$10 / $50
  2. Claude Fable 5.1$10 / $50
  3. GPT-6 Astra$10 / $50
  4. Claude Opus 5.5$4 / $20
  5. Claude Sonnet 5$2 / $10
  6. Muse Spark 1.3$1.25 / $4.25
  7. Gemini 3.8 Flash$0.75 / $3.75
Context window, in tokens

how much it reads at once

  1. GPT-6 Astra1.05M
  2. Muse Spark 1.31.05M
  3. Gemini 3.8 Flash1.05M
  4. Claude Sonnet 51M
  5. Claude Opus 5.51M
  6. Claude Mythos 5.11M
  7. Claude Fable 5.11M

Next to the newest Anthropic models and the current model from other labs. Prices are in US dollars per million tokens.

What is Claude Sonnet 5?

Claude Sonnet 5 is a model from Anthropic, built in the US. It's out, and you can use it today.

When did Claude Sonnet 5 come out?

Anthropic released it on June 30, 2026. That date comes from Anthropic's announcement.

More from Anthropic

AnthropicLive

Claude Opus 5.5

in /1M
$4
out /1M
$20
context
1M
AnthropicLive

Claude Mythos 5.1

in /1M
$10
out /1M
$50
context
1M
AnthropicLive

Claude Fable 5.1

in /1M
$10
out /1M
$50
context
1M
AnthropicLive

Claude Opus 5

in /1M
$5
out /1M
$25
context
1M
AnthropicLive

Claude Fable 5

in /1M
$10
out /1M
$50
context
1M
AnthropicLive

Claude Haiku 4.5

in /1M
$1
out /1M
$5
context
200K
AnthropicLive

Claude Sonnet 4.5

in /1M
$3
out /1M
$15
context
200K
AnthropicNot a model

Claude Opus 5.1

Most likely meant: Claude Opus 5 or Claude Fable 5.1

More news: Anthropic news and Claude updates

.